Loading-coil case and the like



Patented Oct. 27, 1925.

UNITED STATES PATENT OFFICE.

CHARLES R. YOUNG, OF BLOOMFIELD, NEW JERSEY, ASSIGNOR TO WESTERNELECTRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION 0F NEWYORK.

LOADING-COIL CA'SE AND THE LIKE.

Original application filed December 28, 1918, Serial No. 268,765.

July 9, 1923.

To all 'whom 'it 'may concer/1L.'

Be it known that I, CHARLES R. YOUNG, a citizen of the United States,residing at Bloomfield, in the county of Essex, State of New Jersey,have invented certain new and useful Improvements in Loading-Coil Casesand the like, of which the following is a full, clear, concise, andexact description.

This invention relates to cases for loading coils, transformers, and thelike and more particularly to sealing and protecting such apparatus. Oneof its objects is the production of a casing for use in tropicalcountries, which will protect the coils or other apparatus mountedtherein from injury by moisture or insects, when such apparatus isinstalled on poles or in other exposed locations.

Another object is to provide a novel method of bringing the coilterminals to the outside of the case in such a manner' that the use ofleading-in wires covered with rubber or similar insulation, which wouldbe quickly destroyed by insects or would rapidly deteriorate under theextreme climatic conditions met in tropical countries, will beunnecessary.

Both of these objects are attained by the use of novel moisture andinsect proof twopiece insulating bushings for .the openings in the casethrough which connection between the` coil and the associated exteriorapparatus or line is made, and consisting of an outer cylindrical memberand an internal washer member placed on opposite sides of the casingwall. Extending through this bushing is a conducting -bolt which servesas the electrical connection between the coil and the outside of thecase. Sealing means consisting of a novel form of insect proof leatherand lead washer is provided, thereby preventing leakage of theinsulating compound with which the case is illed.

The invention will be better understood by reference to the accompanyingdrawing wherein:

Fig. 1 is a vertical sectional view on line 1, 1 of Fig. 2 of a case forloading coils,

embodying said invention, and Fig. 2 is a sectional plan View Vof thecase on line 2, 2 of Fig. 1.

The case 1 constructed of any desired nia Divided and this applicationfiled Serial No. 650,321.

terial, such as iron, is arranged to receive a loading or toroidalshaped coil 2 adapted to be supported therein in any desired manner suchas `on a spindle or axial support 3, rigidly mounted within andpreferably secured at its lower end to the bottom of the case. Thisspindle is preferably of nonmagnetic material such as wood, and ismaintained in an upright rigid position by a spider 1l, which is securedto the inner wall of the case by clamping screws 5. The case yispreferably constructed with an annular outwardly-projecting flange 6 towhich the cover 7 is secured by the bolts 8, a corrugated copper gasket7 coated with red lead being interposed between said coverl and flange.

The bottom of the case is provided with openings .9 into each of whichone end of a cylindrical insulating bushing member 10, made of anysuitable material such as porcelain, is inserted. Overlying the outerperiphery of the openings 9, are annular shoulders 11 formed integrallywith the bushings 10. Interposed between these shoulders and the casing2, is a compound seal made up of a resilient washer 12 and anon-resilient compressible washer 13. The washer l2 is preferably ofleather', and the washer 13 of lead which serves to shield the leatherwasher from .the attacks of insects. 'As a further protection it ispreferable to impregnate the leather washer with chlorinatednaphthalene, as experience has shown that insects are repelled by it. Anopening 141 extends axially through the bushing member 10 and isprovided with an internal annular shoulder or seat 15. The outer orlower end of these bushings is provided with double petticoats 16,formed integrally therewith, thereby increasing the external surface ofthe insulator at this point and increasing the insulation by minimizingwhat is known as surface leakage.

Surrounding the bushings 10 is a housing or shed 16a open at the bottom,and formed by downwardly extending the side walls of the case.

Inside the case and formed integrally with the bottom are a plurality ofbosses 17 which surround the periphery of the openings 9. Overlying saidopenings and coaxial with the outer cylindrical members lili 10 arelocated insulating Washer members lugs andthe two-piecebushing-l and10,j is a bolt 23 havinga squarehead 24, its

other end being., screwfthreaded .and proand a l eathen 2 Washer 2impregnated with a Wan compoundcontaining anhinsectrepellinggelement-,which seats lon the annular able to solderetheheadQbof the conducting bolt Qfto theterminal ingenti, to further preventinsectsfrom y.attacking the; leather Washer 27, the space V.surroundingsaid leathen uf-ashes,2,7,r and the brass Washer 26 is filled withmolten lead 3.9, 1

In order to provide suitable inountingfarequired, for installation avithloading'l coils of they; type described, ,a conipartmentgor housing ilis provided,-` ,fQrined at. theside of andintegrallya ith theQcase, andhaving a hingedfdgor 3 1, infivh'ichare mounted vacuum tubelightningarrestersconsisting of a porcelain or-other insulatingbasel,con* tact clips 53 ,and 35i, and a vacuumarrester tube The terminals v`ofC th ese arrester;sg are brought inside ,the case by f an. arrangement0f nsulatinggbushings, Sealing {washersA and.4 conducting' b oltssimilar l`to those r,j 11st clescribed, 4en@ ept that the cylindrical'members of thisfgronpof bushingSiQ-lljvhich thelar; resterfwbasesisst;Vas sllevviigr arer net .petticoated,and that theV outer or threadedpor? tion of the, conducting. bolts Viare connected withthewontactstlips- 33 and 3 4: ,by means 0f nutS fi A Aftenthecoils arein placeand the Windings connectedwith the, terminal lugs by anysuitable ,.ine'ans, preferably rubber Jin sulated ivire, the. caseislledtdabout the bottoinwof, .the spider. fl lwith -asuitable sealingcompound snch fas resin and resin-oil;V rlhis compoiincl-tvill flowAinto and-fill the spaces. betxveenthe casing, Wall, the'. bushings `andthe yconducting bolts, but, Will not pass the leather Washers 12 andlavliich prevent the! compound from leaking, to the outside of the case.

The cover is then secured in place ,and through an ope ning 3 6thereiinhot asphal-- tum isnpouredquntil the-V oase iscompletely filled.A plug 38 coated with red lead is moisture.

Connections with the line are made by Isoldering?. the -vlinexvireszinto the .-slottednends i of the screws .29,- Which are. heldingcontactf are provided frjthe purpose of'supporting the case from rthepole or other supporting z fixture, through the medium of `U-shapedhangers 41,4%

iIi, hasbeen divided 'out of my application Serial No. 268,765-, filedDecember 28,1918. vided v ivith roundnutsa brass` ivasheri26,

The invention claimedis; 1. The. vcombination',vith a" l"casing.V forThe invention described andclaimed hereloadi-ngcoils and the; like,having insulating" ;buShingshaVing coaxial parts interior and meansretained thereby extending Vthrough exteriory ofsaidcasing,` andconducting L the Wall ofsaid casing, of` sealing. gaskets( between theexterior part of said insulating4 bushing vand said casing Yand betvveensaid conducting means and bushing, 'and a Washer concentricallysurroimdingsaid' gas-` u ket, andmeans for making saidj'w'asher praczVcilitiesgforfthellghmng 1il- 'lfQSSlfequipment V't-ically impervious toinsects.

2. The combination Vwith acasing Wall havingan opening therethr ough,ofa tWopart insulatingrbushing vmember having an opening extending ixiallytherethrouglr".

one end ofthe outer. part of saidfinember eX- .,tending into saidopening ii i th% casing'vv'all and theother part lWithinSaid casing,theJ outen part of, said member, ibeing provided clampingV the parts ofsaid member together'.4

, -1.3. They 'combinationwith acasing Wall having` an openingtherethrough, of* a twov A piece insulatingbusliing comprising an out-Wer.. member and an', inner'member, lsaid outer-member havingone'-jendextending into :said opening inthe `casing Wall, and'having a ShOuldeiadjacent said' end overlying member resting on, the opposite side ofsaid -casing ,;iva ll, bossesj surrounding jthe. pe,-

riphery ofsaid'openingin the casing Wall the periphery fof vsa-idopening, said inner l and cooperatingjvith thesaid inner inem-. V

.-ber topre vent it fro1' n turning, a conducting boltextending-'through said bushi'ngand` Ycasing Wall, and means coactingwith said bolt for holding said bushing lineinbers and casing ,Wall inassembled relation. i'

member having its' inner end extending into insulatingbushing eomprisingan external said opening in the casing wall and provided adjacent saidinner end with a shoulder overlying the periphery of said opening in thecasing wall, petticoats on the outer end of said external member, aninternal member having slots in the side adjacent to the casing wall andcoinciding with bosses surrounding the periphery of the said opening inthe casing wall, and a conducting bolt extending through the opening insaid bushing members, and means co-acting with said bolt for holdingsaid bushing members and casing wall in assembled relation.

5. The combination with a casing wall having an opening therethrough, ofa two piece insulating bushing comprising an outer member and an innermember, said outer member having an opening extending axiallytherethrough and provided with an internal shoulder, one end of saidouter member extending into said opening in the casing wall and providedadjacent said end with a shoulder overlying the periphery of saidopening in the casing wall, petticoats on the other end of said outermember, sealing gaskets between said shoulder and the periphery of saidopening in the casing wall, said inner member having radial slots in theside adjacent to the casing Wall, bosses on said casing wall surroundingthe eriphery of the opening therein and coinci ing with but notcompletely filling said radial slots, a conducting bolt extendingaxially through said bushing, sealing gaskets surrounding saidconducting bolt and bearing on said internal shoulder, means co-aetingwith said bolt for holding said bushing members, gaskets and casing wallin assembled relation, and insulating compound between said conducingbolt bushing members and casing wal 6. The combination of a casinghaving a*` wall, an opening therein, an electrical conductor comprisinga bolt passing through said opening, a disc inside of said casing havingan aperture to receive said bolt, an insulating bushing outside of saidcasing having a plurality of shoulders and an aperture to receive saidbolt, a washer between one of said shoulders and said wall and a secondwasher between said bolt and said bushing, and a nut on said bolt forclamping said parts.

In witness whereof, l hereunto subscribe my name this 3 day of July A.D., 1923. CHARLES R. YOUNG.

